<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>my css4</title>
    <style>
        .container {
            width: 1200px;
            margin: 0 auto;
        }
        .images {
            width: 400px;
            float: left;
        }
        img {
            width: 100%;
        }
        ul {
            list-style-type: none;   /*取消项目标号*/
            padding: 0;   /*删除内边距*/
        }
        li {
            float: left;
        }
        .empty {
            clear: both;   /*清除浮动*/
        }
        a {
            font-size: 20px;
            text-decoration: none;   /*清除下划线*/
            width: 200px;
            display: block;
            height: 50px;
            background-color: #BEBEBE;
            border-bottom: 2px solid #900B09;
            text-align: center;
            line-height: 50px;
            color: white;
        }
        a:hover {
            background-color: #900B09;
        }
    </style>
</head>
<body>
<div class="container">
    <div class="row">
        <ul>
            <li><a href="#">linux</a></li>
            <li><a href="#">network</a></li>
            <li><a href="#">python</a></li>
            <li><a href="#">html</a></li>
            <li><a href="#">css</a></li>
            <li><a href="#">javascript</a></li>
        </ul>
    </div>
    <div class="empty"></div>
    <div class="row">
        <div class="images">
            <img src="http://pic1.win4000.com/wallpaper/1/5877373858107.jpg">
        </div>
        <div class="images">
            <img src="http://pic1.win4000.com/wallpaper/6/587322853ba7a.jpg">
        </div>
        <div class="images">
            <img src="http://pic1.win4000.com/wallpaper/6/5873228856272.jpg">
        </div>
    </div>
</div>
</body>
</html>